US4034182A - Method of fabricating rings from separate segments and fixture for use therewith - Google Patents

Method of fabricating rings from separate segments and fixture for use therewith Download PDF

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Publication number
US4034182A
US4034182A US05/533,587 US53358774A US4034182A US 4034182 A US4034182 A US 4034182A US 53358774 A US53358774 A US 53358774A US 4034182 A US4034182 A US 4034182A
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US
United States
Prior art keywords
segments
welding
ring
joint
fixture
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US05/533,587
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English (en)
Inventor
Werner Schlosser
Horst Berger
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
MTU Aero Engines GmbH
Original Assignee
MTU Motoren und Turbinen Union Muenchen GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by MTU Motoren und Turbinen Union Muenchen GmbH filed Critical MTU Motoren und Turbinen Union Muenchen GmbH
Priority to US05/781,909 priority Critical patent/US4092018A/en
Application granted granted Critical
Publication of US4034182A publication Critical patent/US4034182A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
    • B23P15/006—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass turbine wheels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K15/00—Electron-beam welding or cutting
    • B23K15/0006—Electron-beam welding or cutting specially adapted for particular articles
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49316—Impeller making
    • Y10T29/4932—Turbomachine making
    • Y10T29/49323—Assembling fluid flow directing devices, e.g., stators, diaphragms, nozzles

Definitions

  • This invention relates to methods and apparatus for fabricating closely-toleranced rings, and more particularly the invention relates to methods and apparatus for fabricating rows of guide vanes, by welding together a plurality of suitably fashioned separate segments with the aid of electron beam welding.
  • a broad object of this invention is to provide a method which gives greater economy than does the method known heretofore and which, more particularly, avoids the great expense of repeated loading in the vacuum chamber and repeated evacuation while still ensuring the requisite degree of accuracy in manufacture and great consistency of results without intolerable rejection rates.
  • This method makes it possible to escape the disadvantages in the state of the art known heretofore and, more particularly, it avoids the costly repetitive loading of grouped segments in the welding chamber, and it gives greater accuracy in shape and more reliably achieved dimensions within the intended close tolerances than will the method known heretofore.
  • the welding beam is guided over the weld joint by electronic means, which makes for faster welding rates. Also, once the initial settings have been made, this method is easy to follow, and it can be repeated at a fast rate.
  • the change-over of the electron beam from one joint to the next is achieved by rotating the welding fixture, which because of the structure of the fixture needed for other reasons, is a simpler expedient than deflecting the electron beam.
  • the sequence of welding the various joints, when tack welding is selected is such that when one tack weld has been completed the fixture is rotated through an angle which places the adjacent joint under the beam. This makes tack welding particularly economical.
  • the sequence of welding the various joints, when finish welding is selected is such that when one finish weld has been completed, the fixture is rotated through 180° for welding a diametrically opposite joint next. This spreads the shrinkage more uniformly over the ring and improves the manufacturing accuracy.
  • a fixture for holding the plate segments having a plurality of jaw segments which are arranged in a circle on a base plate for radial sliding movement in a single plane.
  • the jaw segments have at their radially outer ends, a locating rim sized in accordance with the diameter of the ring, and have at their inner ends, a vertical leg serving to uniformly draw the jaw segments inwards with the aid of a suitable clamping ring having a tapered inner face.
  • the fixture is further provided with a cover plate having a tapered inner face at its outer edge and a central hole for sliding movement over a guide rod, the locating rims of the jaw segments and the tapered inner face of the cover plate uniformly urging the separate ring segments radially inwards, constraining them to take the form of a ring and clamping them one against the other.
  • This fixture serves to rapidly arrange and retain in their relative position all ring segments needed to form a ring, and it permits the ring segments to be safely clamped one against the other in front and to be advanced during welding as necessary to make up for shrinkage. It further ensures faithful preservation of the annular form before and during welding.
  • the fixture is provided with slots cut into the rim of the cover and into each locating rim, the slots being disposed such that the electron beam can readily cover the entire length of a joint, so that the joints between the ring segments can be welded over their full length.
  • surface ball bearings are arranged between the jaw segments to minimize friction between the jaw segments and the base plate and to assist the radial follow-up movements of the jaw segments.
  • the fixture is provided with an annular surface ball bearing arranged between the central guide hole in the cover and the guide rod to assist the follow-up movements of the cover and thus improve manufacturing accuracy.
  • FIG. 1 is a perspective view of a plate segment and vane
  • FIG. 2 is a plan view of a ring composed of plate segments, before and after welding (the latter being shown in broken lines);
  • FIG. 3 is a plan view of a row of guide vanes fabricated in accordance with the method of this invention.
  • FIG. 4 diagrammatically illustrates a sequence of tack welding
  • FIG. 5 diagrammatically illustrates a sequence of finish welding
  • FIG. 6 is a cross-sectional view illustrating the left-hand half of a fixture for manufacturing a ring by means of the method of this invention using plain bearings;
  • FIG. 7 is a cross-sectional view illustrating the right-hand half of the fixture shown in FIG. 6, but with roller bearings;
  • FIG. 8 is a detail view of a portion of FIG. 7 illustrating the retaining means for vanes, this retaining means having slots;
  • FIG. 9 is a top view illustrating a sector of a base plate having plate segments (slotted design).
  • FIG. 10 is a top view illustrating a sector as shown in FIG. 9, having vanes and a clamping ring in position;
  • FIG. 11 is a top view illustrating a sector as shown in FIG. 9, having a cover plate in position with slots;
  • FIG. 12 is a top view illustrating a sector as shown in FIG. 11, but without slots.
  • a ring 1 to be fabricated in accordance with the concept of this invention is completely assembled from separate segments 2 having a sufficient allowance of extra material on their welding edges to compensate for shrinkage. This makes the ring, before welding, considerably oversized. The ring is then introduced into the vacuum chamber of an electron beam welding machine and the separate segments are welded one to the other, with the amount of shrinkage, anticipated by the allowance of extra material, occurring in every joint. After welding and cooling, the ring will have the intended diameter.
  • Such a ring, composed of simple plates 2 is shown in FIG. 2 before and after welding (the latter condition is indicated in broken lines).
  • a compressor stator ring 4, also fabricated from separate segments 3, is essentially manufactured in the same manner, except that the place of the separate segments 2 is taken by platforms 5 unitarily connected with compressor stator vanes 6.
  • the platforms have extra material 7 allowed at the welding edges to make up for shrinkage in welding (FIGS. 1 and 3).
  • electron beam welding it has been found useful to tack weld the vanes in a first operation before finish welding them in a second operation. It has also been shown that the sequence of welding should best not be random.
  • the drawings illustrate the welding sequence for tack welding (FIG. 4) and finish welding (FIG. 5) a ring composed of 36 separate segments.
  • FIG. 6 to 12 A useful fixture for clamping, e.g., compressor stator vane segments to form a compressor stator ring is also shown in the drawings (FIGS. 6 to 12).
  • Circularly arranged on a base plate 8 are a number of jaw segments 9, 10, e.g., 12 segments, capable of radial sliding movement. At their radially outer ends they are formed with locating rims 11 within which all ring segments 5 of a ring are arranged circumferentially one next to the other. At their radially inner ends the jaw segments have upstanding legs 12 presenting angled slide faces 13 which are uniformly urged radially inwards by cooperating with the tapered inner face 14 of a clamping ring 15.
  • This arrangement serves to clamp all the ring segments 5 at their ends nearer the base plate to form a ring.
  • the same function is served also by a cover plate 16, the tapered inner face 21 (FIG. 8) of which also tightens the ring at its upper end, and thus completely.
  • Tension comes from the force of the clamping ring and the cover plate bearing down on the base plate as a result of their weight and, chiefly, from springs 17, 18 which are preloaded by nuts. This makes the proper functioning of the fixture independent of its position.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Welding Or Cutting Using Electron Beams (AREA)
  • Butt Welding And Welding Of Specific Article (AREA)
US05/533,587 1973-12-21 1974-12-17 Method of fabricating rings from separate segments and fixture for use therewith Expired - Lifetime US4034182A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US05/781,909 US4092018A (en) 1973-12-21 1977-03-28 Fixture for use in fabricating rings from separate segments

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2363722A DE2363722C3 (de) 1973-12-21 1973-12-21 Verfahren und Vorrichtung zur Herstellung von Ringen durch Zusammenschweißen von segmentartigen Teilstücken
DT2363722 1973-12-21

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US05/781,909 Division US4092018A (en) 1973-12-21 1977-03-28 Fixture for use in fabricating rings from separate segments

Publications (1)

Publication Number Publication Date
US4034182A true US4034182A (en) 1977-07-05

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US05/533,587 Expired - Lifetime US4034182A (en) 1973-12-21 1974-12-17 Method of fabricating rings from separate segments and fixture for use therewith

Country Status (6)

Country Link
US (1) US4034182A (zh)
BE (1) BE823604A (zh)
DE (1) DE2363722C3 (zh)
FR (1) FR2255139B1 (zh)
GB (1) GB1478508A (zh)
IT (1) IT1026818B (zh)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4464094A (en) * 1979-05-04 1984-08-07 Trw Inc. Turbine engine component and method of making the same
FR2700130A1 (fr) * 1993-01-06 1994-07-08 Snecma Procédé de fabrication d'un rotor monobloc à aubes creuses et rotor monobloc à aubes creuses.
US5977509A (en) * 1998-08-06 1999-11-02 Schlumberger Technology Corporation Method for full penetration electron beam weld for downhold tools
US20050084381A1 (en) * 2003-10-21 2005-04-21 General Electric Company Tri-property rotor assembly of a turbine engine, and method for its preparation
US20070084053A1 (en) * 2005-10-17 2007-04-19 Pratt & Whitney Canada Corp. Blade tip grinding tooling
CN100395068C (zh) * 2005-12-29 2008-06-18 东方电气集团东方汽轮机有限公司 燃气轮机压气机静叶环高压真空电子束焊接方法
WO2010040340A1 (de) * 2008-10-09 2010-04-15 Mtu Aero Engines Gmbh Verfahren zum herstellen eines rotors und rotor
US20130097850A1 (en) * 2011-10-24 2013-04-25 General Electric Company Apparatus and method for servicing a turbine component
US20150258633A1 (en) * 2012-09-18 2015-09-17 Mitsubishi Heavy Industries, Ltd. Movable vacuum welding device
CN110202308A (zh) * 2019-06-27 2019-09-06 四川禄江环保科技有限公司 一种快速定位组装钢套环固定装置

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2815847C2 (de) * 1978-04-12 1982-06-09 BHS-Bayerische Berg-, Hütten- und Salzwerke AG, 8000 München Ritzel mit mindestens einem Druckring zur Aufnahme von Axialkräften
US4662046A (en) * 1981-06-22 1987-05-05 Vickers, Incorporated Power transmission
CN111168264A (zh) * 2019-12-11 2020-05-19 中国航空工业集团公司北京航空精密机械研究所 一种焊接式整体导轨的制备方法
CN114192959A (zh) * 2021-12-08 2022-03-18 中核建中核燃料元件有限公司 采用局部3d打印结构的核燃料下管座的电子束焊接方法

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2345918A (en) * 1941-05-14 1944-04-04 Allis Chalmers Mfg Co Method of making shroud structures
US2392281A (en) * 1941-07-10 1946-01-01 Allis Chalmers Mfg Co Method of making welded blade structures
US2450493A (en) * 1944-02-25 1948-10-05 Strub Rene Turbine rotor and its method of manufacture
US2454580A (en) * 1943-03-18 1948-11-23 Gen Electric Method of manufacturing bladed rotors
FR995813A (fr) * 1948-09-29 1951-12-10 Westinghouse Electric Corp Perfectionnements aux turbines
US2579583A (en) * 1945-01-29 1951-12-25 Allis Chalmers Mfg Co Segmental blading
FR1338837A (fr) * 1962-11-12 1963-09-27 Maschf Augsburg Nuernberg Ag Procédé et dispositif pour la fixation par soudage électronique des aubes sur les plateaux de roues mobiles des machines telles que turbines et pompes
US3609841A (en) * 1967-08-02 1971-10-05 English Electric Co Ltd Method of making blade ring assemblies
US3617685A (en) * 1970-08-19 1971-11-02 Chromalloy American Corp Method of producing crack-free electron beam welds of jet engine components
FR2083846A5 (en) * 1970-03-14 1971-12-17 Motoren Turbinen Union Gas turbine rotors and blades assembled by electron bombardment - welding - with efficient assembly cooling means
US3705971A (en) * 1970-08-13 1972-12-12 Gen Motors Corp Induction motor fabrication method

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2345918A (en) * 1941-05-14 1944-04-04 Allis Chalmers Mfg Co Method of making shroud structures
US2392281A (en) * 1941-07-10 1946-01-01 Allis Chalmers Mfg Co Method of making welded blade structures
US2454580A (en) * 1943-03-18 1948-11-23 Gen Electric Method of manufacturing bladed rotors
US2450493A (en) * 1944-02-25 1948-10-05 Strub Rene Turbine rotor and its method of manufacture
US2579583A (en) * 1945-01-29 1951-12-25 Allis Chalmers Mfg Co Segmental blading
FR995813A (fr) * 1948-09-29 1951-12-10 Westinghouse Electric Corp Perfectionnements aux turbines
FR1338837A (fr) * 1962-11-12 1963-09-27 Maschf Augsburg Nuernberg Ag Procédé et dispositif pour la fixation par soudage électronique des aubes sur les plateaux de roues mobiles des machines telles que turbines et pompes
US3609841A (en) * 1967-08-02 1971-10-05 English Electric Co Ltd Method of making blade ring assemblies
FR2083846A5 (en) * 1970-03-14 1971-12-17 Motoren Turbinen Union Gas turbine rotors and blades assembled by electron bombardment - welding - with efficient assembly cooling means
US3705971A (en) * 1970-08-13 1972-12-12 Gen Motors Corp Induction motor fabrication method
US3617685A (en) * 1970-08-19 1971-11-02 Chromalloy American Corp Method of producing crack-free electron beam welds of jet engine components

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
J. Lyman, Ed., Metals Handbook, 8th ed., vol. 6, 1971, pp. 540, 550, 551. *

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4464094A (en) * 1979-05-04 1984-08-07 Trw Inc. Turbine engine component and method of making the same
FR2700130A1 (fr) * 1993-01-06 1994-07-08 Snecma Procédé de fabrication d'un rotor monobloc à aubes creuses et rotor monobloc à aubes creuses.
US5511949A (en) * 1993-01-06 1996-04-30 Societe Nationale D'etude Et De Construction De Moteurs D'aviation "Snecma" Method for producing a monobloc rotor with hollow blades and monobloc rotor with hollow blades obtained by said method
US5977509A (en) * 1998-08-06 1999-11-02 Schlumberger Technology Corporation Method for full penetration electron beam weld for downhold tools
US20050084381A1 (en) * 2003-10-21 2005-04-21 General Electric Company Tri-property rotor assembly of a turbine engine, and method for its preparation
US6969238B2 (en) 2003-10-21 2005-11-29 General Electric Company Tri-property rotor assembly of a turbine engine, and method for its preparation
US7765658B2 (en) * 2005-10-17 2010-08-03 Pratt & Whitney Canada Corp. Blade tip grinding tooling
US20070084053A1 (en) * 2005-10-17 2007-04-19 Pratt & Whitney Canada Corp. Blade tip grinding tooling
CN100395068C (zh) * 2005-12-29 2008-06-18 东方电气集团东方汽轮机有限公司 燃气轮机压气机静叶环高压真空电子束焊接方法
WO2010040340A1 (de) * 2008-10-09 2010-04-15 Mtu Aero Engines Gmbh Verfahren zum herstellen eines rotors und rotor
US20110176922A1 (en) * 2008-10-09 2011-07-21 Mtu Aero Engines Gmbh Method for the production of a rotor and rotor
US9956652B2 (en) 2008-10-09 2018-05-01 Mtu Aero Engines Gmbh Method for the production of a rotor and rotor
US20130097850A1 (en) * 2011-10-24 2013-04-25 General Electric Company Apparatus and method for servicing a turbine component
US20150258633A1 (en) * 2012-09-18 2015-09-17 Mitsubishi Heavy Industries, Ltd. Movable vacuum welding device
US9358638B2 (en) * 2012-09-18 2016-06-07 Mitsubishi Heavy Industries Machine Tool Co., Ltd. Movable vacuum welding device
CN110202308A (zh) * 2019-06-27 2019-09-06 四川禄江环保科技有限公司 一种快速定位组装钢套环固定装置

Also Published As

Publication number Publication date
BE823604A (fr) 1975-04-16
IT1026818B (it) 1978-10-20
DE2363722A1 (de) 1976-01-29
FR2255139B1 (zh) 1978-09-29
DE2363722B2 (de) 1978-03-16
GB1478508A (en) 1977-07-06
FR2255139A1 (zh) 1975-07-18
DE2363722C3 (de) 1978-12-14

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